Topic outline

  • Use of Soil Anchors for LWM Structures in Streams

    Credits: 1 PDH

    PDH Course Description:

    The success of a soil bioengineering project that uses large woody material (LWM) structures depends on proper anchoring design. This course presents three of the more common anchoring methods used: driven soil anchors, screw-in soil anchors, and cabling to boulders or bedrock. Also covered is a method for estimating the pullout capacity required of the anchor and another method for connecting of the anchor to a LWM structure.

    Selecting the anchoring method and sizing the anchor require information about the expected streamflows and soil characteristics. The required pullout capacity per anchor can be estimated from the streamflow information, and the anchor type and method can be selected from the soil information.

    Topics:

    • Calculating the forces acting on a LWM structure
    • Soil anchor types
    • Driven Anchors
    • Screw-in Anchors
    • Cabling (wire rope) to boulders or bedrock
    • Wire rope, connectors and tensioning
    • Method for calculating forces acting on a LWM structure
    • Drag and buoyance forces
    • Anchor manufacturer data
    • Specific gravity of wood
    • Example calculation

    To take this course:

    1.) Enroll in Course: Click below to enroll:
    (must be logged into your user account)


    2.) Study:Once enrolled, click below to begin the course:

    Download the Study Guide

    3.) Test: Once you've thoroughly read the course materials, please click below to take the final examination.

    Take the final exam

    4.) Certificate: A passing grade of 70% or higher on the exam, is required to receive the certificate of completion for this PDH course.
         NOTE: After the exam is completed, you will need to return to this page, in order to print (download) the certificate of completion.

    Print the Certificate of Completion

    Intended Audience: This course is intended for Hydraulic, Water Resource, Geotechnical, Civil, Environmental, and other engineers whose job description may require a general knowledge of soil anchoring applications and design procedures for use in streambed or streambank reinforcement.
    Publication Source: US NRCS

    Donald Parnell, PE

    • Topic 1